Thesaurus

insidious

adjective

Synonyms & Antonyms of insidious

See the Dictionary Definition 

Keep scrolling for more

Learn More About insidious

Time Traveler for insidious

Time Traveler

The first known use of insidious was in 1545

See more words from the same year

Thesaurus Entries Near insidious

inside tracks

insidious

insidiously

See More Nearby Entries 

Cite this Entry

“Insidious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insidious. Accessed 19 Aug. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on insidious

Nglish: Translation of insidious for Spanish Speakers

Britannica English: Translation of insidious for Arabic Speakers


Words Named After People

  • name tags
  • Namesake of the leotard, Jules Léotard had what profession?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ

Keep scrolling for more

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!